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Redaksi Jurnal Rekayasa Mesin Jurusan Teknik Mesin Fakultas Teknik, Universitas Brawijaya Jl. MT. Haryono 167 Malang, Jawa Timur Indonesia 65145
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Rekayasa Mesin
Published by Universitas Brawijaya
ISSN : 23381663     EISSN : 24776041     DOI : 10.21776/ub.jrm
Core Subject : Engineering,
Mechanical Engineering
Rekayasa Mesin is published by Mechanical Engineering Department, Faculty of Engineering, Brawijaya, Malang-East Java-Indonesia. Rekayasa Mesin is an open-access peer reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in mechanical engineering. Rekayasa Mesin accepts submission from all over the world, especially from Indonesia. Rekayasa Mesin aims to provide a forum for national and international academicians, researchers and practitioners on mechanical engineering to publish the original articles. All accepted articles will be published and will be freely available to all readers with worldwide visibility and coverage. The scope of Rekayasa Mesin are the specific topics issues in mechanical engineering such as design, energy conversion, manufacture, and metallurgy. All articles submitted to this journal can be written in Bahasa and English Language.
Arjuna Subject : -
Articles 965 Documents
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HELICAL TUBE HEAT EXCHANGER DESIGN FOR MILK PASTEURIZATION PROCESS WITH HIGH TEMPERATURE SHORT TIME: English Kharisma , Aji Abdillah; Sari, Sri Poernomo; Suhada , Mochammad Fiqri
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1683

Abstract

The most common issue facing by the beverage industry is to maintain the cleanliness of a product. It is very important to note, especially for milk pasteurization process to kill bacteria, thus a heat exchanger is required. Heat exchanger is a device that allows heat transfer between two fluids of different temperatures. The purpose of this research is to design a helical tube heat exchanger, where this heat exchanger is focused on the heating process in milk pasteurization process. The designed tube is a helical model for the flow of milk fluid. The research method is carried out by designing a helical tube heat exchanger and performing simulations and mathematical calculations on the heat transfer. After simulation using software assistance and mathematical calculations, resulting shell length is 1.5 m, helical tube length is 6.4 m, shell diameter is 0.3 m and helical tube diameter is 0.023 m, totaling three pieces each. The shell utilized 304 stainless steel material and the helical tube used copper material which aims to improve the heat transfer process. The operating principle of this heat exchanger is as a heat exchange medium for milk fluid, the process will be carried out by this heat exchanger is the milk pasteurization process. The milk pasteurization method carried out in this final project is the higher temperature short time (HTST) method, which is the process of heating the milk fluid by producing milk outlet between 70oC – 75oC  for 15 seconds.
PERANCANGAN ALAT BENCH TEST DENGAN 5 VALVE UJI CLASS 800 UNTUK SATU SIKLUS Dionisius, Felix; Annabani , Muhammad Taqiyyudin; Suhardi, Suhardi; Chaerul, Chaerul
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1686

Abstract

Hydrotest testing carried out in the valve industry still uses manual methods. This makes the hydro test process less efficient in processing time. Therefore, it is necessary to design a valve testing tool to speed up the testing process. The tool is designed must be able to withstand the hydro test pressure in the specified number of valves simultaneously. This research was a design on frame strength testing which aims to operate at certain pressures by standards. The method was used by numerical simulation and theoretical. Theoretical with cross or distribution method was used as validation of numerical simulation results. The results of the numerical simulation show safe results when operating with a von misses stress of 193,155 N/mm2. While the error of the design produced with theoretical calculations is 32-33%.
PENGARUH PERSENTASE ZIRCONIA BALL TERHADAP VOLUME MILL JAR PADA PROSES PENGHALUSAN SERBUK KERAMIK ALUMINA DENGAN ALAT HORIZONTAL BALL MILL Indra, Ade; Wigianto , Fadrian Wigianto; Perdana , Mastariyanto
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1689

Abstract

Research has been conducted on the effect of Zirconia Ball on the volume of Mill Jar in the process of smoothing Alumina ceramic powder with Horizontal Ball Mill tool. The research was conducted by adjusting the percentage variation of Zirconia Ball by 30%, 40%, 50%, 60%, 70%, and 80% of the Mill Jar capacity. Then the Particle Size Analyzer (PSA) test, observation of Alumina powder shape with Scanning Electron Microscope (SEM), and phase testing with X-Ray Diffraction (XRD) were conducted. From the PSA test results, it was found that the best pulverization results with the smallest results were found in the volume setting of 40% of the Mill Jar capacity carried out at a horizontal ball mill rotation of 150 rpm for 6 hours. These results were proven through PSA and SEM tests, and no Zirconia Ball contamination was found in the Alumina powder pulverization results.
EFFECT OF ANNEALING ON MICROSTRUCTURE AND HARDNESS OF FeNiCo ALLOYS SYNTHESIZED BY MECHANICAL ALLOYING Sutrisna, Sutrisna; Pamuji, Didit Setyo; Prasetiyo, Angger Bagus; Ababil, Ismail Zulpria; Aziz, Ihwanul
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1690

Abstract

Alloys based on Fe-Ni-Co are categorized as special nickel-based superalloys with braod application as magnetic sensors in electric motors, recording devices as well as for vehicle engine parts. The purpose of this study was to determine the physical and mechanical properties of Fe-Ni-Co materials synthesized by mechanical alloying method, then subjected to annealing temperature variation i.e 800oC, 900oC, and 1000oC for 1 hour. Test methods carried out by XRD-spectra to identify the phase, SEM and EDS mapping to determine the microstructure and composition together with micro hardness test to represent the mechanical properties of this FeNiCo alloys. The results of the XRD test showed that Co atoms and some Fe dissolved into the Ni crystal lattice tended to form a solid solution of g-Ni(Fe,Co). Microstructural observations at 900 OC after milling for 16 hours showed a fine and homogeneous grain structure. The highest hardness value was 421.5 kg/mm2 at 16 hours milling. The Fe-Ni-Co alloy exhibited a homogeneous microstructural distribution with a fine grain structure and high densification.
TECHNO ECONOMIC ANALYSIS OF BIOMASS AS AN ALTERNATIVE ENERGY HOUSEHOLDS AND SMALL INDUSTRIES Dewi, Rany Puspita; Trisma Jaya Saputra; Mario Ammar Rasyid
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1692

Abstract

Briquetting technology became one appropriate method that can be used to convert biomass waste into a renewable energy source. Sources of biomass raw materials that have promising potential are pine sawdust and coconut shell waste. Sawdust has potential for about 0.78 million m3/year and coconut shell waste around 360 thousand tons/year. The research aim was to analyze the effect of the carbonization temperature to volatile matter and fixed carbon of briquette. The research was done by variating carbonization temperature at 400oC, 500oC, and 600oC. The result showed that at carbonization temperature of 400oC, the volatile matter and fixed carbon was 42.28% and 55.74%. The volatile matter and fixed carbon are 43.19% and 54.96%, found at carbonization temperature 500oC. The highest fixed carbon 55.98% and the lowest volatile matter 42.19% was found from carbonization temperature at 600oC. The carbonization temperature in briquetting process affect the volatile matter and fixed carbon of briquette
UJI KUALITAS BRIKET ARANG DARI SEKAM PADI DAN SERBUK KAYU SEBAGAI BAHAN BAKAR ALTERNATIF Urwatul Wusko, Ikna; Noraidi Maulana , Antan; Sabitah, A’yan; Misbachudin
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1694

Abstract

The availability of sawdust and rice husks is abundant, so the utilization of these wastes in the South Kalimantan region is very profitable. Apart from that, there are several references that mention rice husk waste and wood dust as prospective biomass sources. In this research, the process of testing the characteristics of composite briquettes made from rice husks and wood dust as an alternative energy source was carried out. This research aims to compare the results of briquette characteristic tests with the results of previous research. The ratio of rice husk-wood dust mixture is 100:0, 70:30, 30:70, and 0:100. For each type of sample, cassava flour with a composition of 10% was used as an adhesive. Of the five parameters; water content, ash content, volatile matter content, fixed carbon, and heating value. There are two parameters that do not meet SNI standards, namely the levels of volatile substances and fixed carbon. For volatile matter levels, the value is still high, namely 45.55%, which should be ≤ 15%, while the value for carbon remains low, namely 35.56%, which should be ≥77%.
PENGARUH SILIKA TERHADAP KARAKTERISTIK FILM LATEKS KARET ALAM DALAM PENGAPLIKASIAN BLADDER COMPRESSION MOULDING Pranata, M. Sagitra; Nugroho, G.; Indrajati, Ihda Novia; Dewi, Indiah Ratna
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1696

Abstract

The objective of this study is to investigate the production and analysis of bladders made from natural rubber latex using the dipping technique, with the aim of identifying the optimal formulation for determining their mechanical properties. The procedure was executed by a series of sequential steps, including dispersion, compaction, and vulcanization. Bladder compression molding was conducted using a range of five samples of SiO2, with varying proportions of 2, 4, 6, 8, and 10 phr. The testing was conducted in accordance with ISO 37, ISO 34-1, and ISO 188 standards. The findings indicated that the optimal formula was derived from the modification including a concentration of 2 parts per hundred of SiO2. The obtained mechanical parameters consist of a tensile strength of 17,972 MPa, an elongation at break of 924 MPa, and a tear strength of 50,478 MPa. The test parameters utilized in this study were in compliance with ISO 37, ISO 34-1, and ISO 188 standards.
ANALISIS EKSPERIMENTAL PENGARUH BELOKAN TAJAM DAN SUSUNAN PIPA TERHADAP PERPINDAHAN PANAS PADA SOLAR WATER HEATER Nasution, Muhammad Syukri; Syuhada, Ahmad; Razali, Razali
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1698

Abstract

Hot water is water that has a temperature above the human body's temperature, which ranges between 37-100°C. The demand for hot water keeps increasing, especially for bathing purposes, as bathing with hot water is more comfortable and can help relax the body. Typically, hot water is obtained by boiling water using oil or wood-burning stoves and using electric water heaters, which increase household expenses. The best alternative to address this issue is to create a solar water heater. To improve the performance of a solar water heater, many researchers have conducted studies on this topic, but further improvements are still needed to achieve more optimal results. This research is conducted to test the effect of the number of sharp bends, the length of the pipe between sharp bends, and the arrangement of the pipe layout on the heat transfer that occurs in a 30 L solar water heater pipe with collector dimensions of 2.5 x 0.8 m². The variations made on the heating pipe involve varying the length of the pipe between sharp bends into three variations, namely (230, 670, 95) cm, arranged horizontally and vertically. Based on the research with an average solar radiation intensity of 790-850 W/m², the most optimal collector occurred in the variation III pipe (95 cm) with an end water temperature of 76.56°C, useful energy of 360.4333 W, solar water heater efficiency of 23.4714%, and convective heat transfer coefficient of 150.7833 W/m²K.
ANALISIS PENGARUH BENTUK LUBANG TERHADAP KARAKTERISTIK PERPINDAHAN PANAS PADA MENARA PENDINGIN TIPE PLAT DATAR BERLUBANG BERTINGKAT Mustika, Yulanda Dwi; Syuhada, Ahmad; Razali , Razali
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1699

Abstract

Cooling tower is one of the most widely used cooling systems in the industrial world. A cooling tower is a series of heat exchange devices that use working fluids, such as water and air, to act as a cooling medium by coming into direct contact with the air, causing a small portion of the water to evaporate and reducing the temperature of the liquid. To enhance the performance of cooling towers, many researchers have conducted studies on this matter, but there is still room for improvement to achieve more optimal results. The objective of this research is to obtain an optimal cooling tower system by determining the convective heat transfer coefficient. With this phenomenon, the research investigates the heat transfer process that occurs on perforated plates in a flat plate-type cooling tower with an overall tower height of approximately 2.4 meters and around 5 levels of fluid distribution media. The length of each plate is 0.7 meters with a width of 0.5 meters. Variations are also made in the multi-level cooling tower design, specifically in the shape of the perforations used, including circular, triangular, and square perforation shapes, using a zig-zag outlet hole model. The perforated plate area is 0.0157 square meters for each plate, with a 15° inclination angle for each plate arrangement. The research results indicate that the highest heat transfer coefficient values occur in the multi-level cooling tower when using square-shaped plates, followed by triangular-shaped plates, while circular-shaped plates have the lowest heat transfer coefficient values. Therefore, variations in the shape of the perforations on the flat plates affect the change in temperature reduction and the heat transfer coefficient values in the performance of the multi-level cooling tower.
PENGARUH MATERIAL TERHADAP DEFORMASI, STRAIN, DAN SAFETY FACTOR PADA BRACKET CALIPER MENGGUNAKAN METODE ELEMEN HINGGA Ghyferi, Andi Abdullah; Bahatmaka, Aldias; Wibowo, Muhammad Yusuf; Anwar, Ahmad; Ridananda, Ayyub; Vandika, Anggi
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1700

Abstract

The purpose of this study is to analyze the deformation, equivalent elastic strain, and safety factor of a bracket bracket made from two different materials by using the Finite Element Method, specifically aluminum alloy 6061 T6 and cast iron EN GJL 100. The result of this study is that the Aluminum Alloy 6061T6 material has a deformation of 3.57E-04 whereas the Cast iron EN GJL 100 material is 2.75E-04. In the elastic strain equivalent test, the Aluminium alloy 6061 T6 material is 3.00-E07 and in the Cast Iron EN G JL 100 materials is 2.32E-07. In the safety factor test, Cast Iron En G J L 100 material was better than 1.8617 compared to the Alumium Alloys 60 61 T6 materials are 1.5125. This shows that Cast Iron E GJ L 100 materials are better in deformations, eqeuivalent elastic stations, and safety factors in this case.

Page 87 of 97 | Total Record : 965

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